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產(chǎn)品型號176S
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廠商性質(zhì)代理商
所 在 地上海市
更新時間:2025-01-15 20:27:52瀏覽次數(shù):1609次
聯(lián)系我時,請告知來自 化工儀器網(wǎng)室內(nèi)空氣甲醛檢測管No.713 FORMALDEHYDE 0.01-0
氯乙烯CH2=CHCl氣體測毒管132SC VINYL CHLORID
氯乙烯CH2=CHCl氣體檢知管132SB VINYL CHLORID
甲基碘CH3I氣體檢測管176S METHYL IODIDE 2-40ppm
Tube 76S
1. PERFORMANCE
1) Measuring range :4-40 ppm 2-20 ppm
Number of pump strokes 2(200ml) 4(400ml)
2) Sampling time :4 minutes/2 pump strokes
3) Detectable limit :0.5 ppm(400ml)
4) Shelf life :8 months
5) Operating temperature :10~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 2 pump strokes
8) Colour change :White→Grey
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:10% RSD-high:10%
3. CHEMICAL REACTION
Iodine pentoxide is reduced.
CH3I+I2O5+H2SO4→I2+CO2+H2O
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
40
35
30
25
20
15
10
468
ppm
GAS To pump
(Yellow)
PRETREAT TUBE DETECTOR TUBE
176S METHYL IODIDE
Substance Interference ppm Coexistence
Acetone Similar stain is produced. 700 Higher readings are given.
Hydrogen sulphide FIG.1 〃7 〃
Hexane FIG.2 〃500 〃
Benzene 2 Lower readings are given.
Toluene 2 〃
Xylene 2 〃
Halogenated hydrocarbons Double-layer stain is produced and
accurate readings are affected.
0
30
20
Hydrogen sulphide〔ppm〕?
FIG.1 Influence of Hydrogen sulphide
Methyl iodide
indicating value 〔ppm〕
510 15 20 25 3035
10
0
20
Hexane〔ppm〕?
FIG.2 Influence of Hexane
Methyl iodide
indicating value 〔ppm〕
500 1000 1500 2000 2500
10
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 10℃ 20℃ 30℃ 40℃
(ppm) (32°F) (50°F) (68°F) (86°F) (104°F)
40 - - 40 46 52
35 - 52 35 42 49
30 54 39 30 37 44
25 37 27 25 25 23
20 30 22 20 23 30
15 24 17 15 17 24
10 17 11 10 12 17
5 10 5 5 5 10
(NOTE)
In case of 4 pump strokes, following formula is available for the actual concentration.
Actual concentration = 1/2 × Tmperature corrected value
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